function [ED] = RSSIEuclideanDistance(X, Y, i)

ED = sqrt( (X(i,1) - Y(1,1) )^2 + ( X(i,2) - Y(1,2) )^2 +  ( X(i,3) - Y(1,3) )^2 + ( X(i,4) - Y(1,4) )^2);

end